OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) + 11*a(n-2) + 23*a(n-3) + 45*a(n-4) + 10*a(n-5) + a(n-6) - 3*a(n-7) - 2*a(n-8).
Empirical g.f.: x*(11 + 32*x - 36*x^2 - 129*x^3 - 34*x^4 - 7*x^5 + 8*x^6 + 6*x^7) / (1 - 5*x - 11*x^2 - 23*x^3 - 45*x^4 - 10*x^5 - x^6 + 3*x^7 + 2*x^8). - Colin Barker, Oct 03 2018
EXAMPLE
Some solutions for n=6:
..0..0..1..0..0..0..0....0..0..0..1..1..1..1....0..0..0..0..0..0..0
..0..1..1..0..1..1..1....0..0..1..1..1..0..1....0..1..1..1..0..1..0
..1..0..0..1..1..1..1....0..1..0..1..0..1..0....1..0..0..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2013
STATUS
approved